Not really.

I try to journal every day and have been since around 2014. The main "benefit" is the ability to look at a random date (say, Jan 19th 2015) and know what I was up to that day/period.

I started journaling hoping it would help clarify my thoughts/reveal something dormant in my mind. It did neither.

One odd quirk: If I'm really deep in a depressive hole, I can identify that by writing a journal entry. If I start freewriting and the content is getting progressively worse (usually devolving into sentence after sentence telling myself to grow up and kill myself), I can sometimes "trick" my brain into realizing I'm in a depressive hole and the world isn't actually an awful place.

It's hard to explain, but the ability to "see" my brain thinking in a downward loop sometimes helps to trigger my rational brain.

On the flip side, in some rare instances if I journal while depressed, it dramatically increases my misery. Instead of just thinking I'm hopeless, it can work as a mental reinforcement that everything I'm writing is true. Journling while depressed is like playing Russian roulette.

Overall, I don't find journaling that beneficial.